轨道交通用感应电机的低速发电稳定性分析

Stability Analysis in Low Speed Regenerating Model of IM for Rail Transit System

基于轨道交通用感应电机在低速发电状态的不稳定运行问题,提出了一种新的反馈增益矩阵的设计方法,将多变量的设计问题转化为单变量的设计问题,并针对劳斯-赫尔维茨稳定性判据在系统动态性能设计方面的不足,对原始虚轴进行平移以重新配置转速估计传递函数零极点,得到性能更好的参数,此举对简化参数的调试工作,提高系统的鲁棒性,具有重要的工程价值。仿真和实验均验证了该分析以及提出的改进措施的正确性和有效性。

Based on the unstable problem at low speed regenerating model of IM(Induction Motor)for rail transit system,this paper proposes a kind of new method for designing feedback gain.This method transforms the multi variable parameters design to single parameter design.And considering the deficiency of Routh-Hurwitz stability criterion in dynamic performance,this paper shifts the original virtual axis to reconfigure the Pole-Zero of speed estimation transfer function,to get the better parameters.Using this method will simplify the debugging effort and improve the robustness of the system,thus this method has enormous engineering value.Both simulation and experiment verify the correctness and effectiveness of the proposed method.